Server-Side Request Forgery in OpenMetadata by OpenMetadata
CVE-2026-100373

5.1MEDIUM

Key Information:

Vendor

Open-metadata

Status
Openmetadata
Vendor
CVE Published:
25 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100373?

OpenMetadata versions up to 2.0.2 exhibit a server-side request forgery vulnerability in the URLValidator.validateURL function. This flaw arises from improper DNS hostname resolution and inadequate validation of internal addresses. Users with permissions to create or update EventSubscription can exploit this vulnerability by configuring webhook destinations to point at internal hosts. As a result, the OpenMetadata server could initiate requests to private networks and cloud metadata endpoints, potentially enabling malicious actors to perform blind SSRF probing while receiving HTTP status codes in response.

Affected Version(s)

OpenMetadata 0 <= 2.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-100373 - Proof of Concept

References

https://gist.github.com/naif-alfardan/8a69e0648e11b07abe6...
exploitthird-party-advisory
https://github.com/open-metadata/OpenMetadata/issues/32592
issue-tracking
https://github.com/open-metadata/OpenMetadata/commit/8f44...
patch

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Naif Al-fardan
.